SAN FRANCISCO — A female grey wolf, her mate and at least three pups are the second pack of wolves spotted in Northern California since the species went extinct there in 1924, state wildlife officials said Wednesday.

MOUNTAIN VIEW, Calif. — The two Swiss pilots taking turns to fly a solar-powered airplane around the world said Sunday the endeavour is not only a demonstration of the importance of renewable energy but also of the many challenges the human body can endure.